Padlock



May 3, 1960 I E. MANCUSO 2,934,929

PADLOCK Filed Oct. 24, 1958 INVENTOR, 80 I1ANUEL NANCUSO;

ATTORNEY 7 PADLOCK Emanuel Mancuso, Burbank, Calif.

Application October 24, 1958, Serial No. 769,486

1 Claim. (Cl. 70-32) The present invention relates to improvements inpadlocks, and has for an object a padlock incorporating improvedmechanism for the actuation of a locking bolt.

A further object is the provision in a padlock of mechanism which iseasily fabricated, positive in its operation, inexpensive in cost ofmanufacture, and superior to mechanisms now known to the inventor.

Other objects of the invention include simplicity of construction, areduction in parts, locking mechanism which is easily repairedin case ofbreakage or other manfunction, which will only require semi-skilledlabor for its fabrication, and is substantially tamper-proof.

With the above mentioned and other objects in view, the inventionconsists in the novel and useful provision, formation, construction,association, and relative arrangement of parts, members and features,all as shown in one embodiment in the accompanying drawing, describedgenerally, and more particularly pointed out in the claim.

In the drawing:

Figure 1 is a front elevation of the padlock,

Figure 2 is a side elevation of the padlock shown in Figure l, andlooking to the left of said figure,

Figure 3 is a sectional view on an enlarged scale, taken on the line3--3 of Figure 2,

Figure 4 is a view similar to that of Figure 3, certain parts being inchanged relationship,

Figure 5 is a fragmentary, sectional view on the line 55 of Figure 3,

Figure 6 is a sectional view on the line 6-6 of Figure 3, a cooperatinghasp being shown in dotted lines, and,

Fig. 7 is a perspective view of the leaf-type spring which serves as alocking means.

Referring now to the drawing, I contemplate incorporating in theimproved padlock, a tumbler type locking mechanism, the barrel of whichis shown in Figure 5,, at 1, for receiving a key 2. The casing orhousing 3 is preferably formed from heavy steel which may be alloyed soas to make it durable, and the rear wall or base 4 of said casing orhousing is recessed so as to accommodate various mechanisms enteringinto the lock structure. Thus, referring to Figures 3 and 4, the casingis transversely routed at 4 to provide a staple receiving recess in themanner shown in Figure 6. In Figure 6, the U- shaped staple 5 is securedat its ends to a base plate 6 of a hasp, which base plate is usuallysecured to a door frame, while a tongue 7 is hinged to a tab which isfastened to the door framing, the tongue being provided with atransverse slot 8 through which the hasp 5 is passed. Thus, in theshowing of Figure 6, when the staple has been passed through the slot 8of the tongue, the padlock may be applied to the staple, the staplebeing received within the staple receiving recess 4 The barrel 1 is heldsecurely to the casing or housing within the bore for said barrel byproviding shoulder portions at '9 and 10 for receiving flange portionson the barrel to thereby lock the barrel to the casing against removal.The base or rear surface 4 of the housing or casing is routed, as shownin Figures 3 and 4, at 11. The routing tates Patent I "ice is such as toprovide a flat surfaced base wall 12, a straight side wall 13 whichextends longitudinally of the casing, and with reference to direction,we assume that the casing is substantially rectangular in form, althoughthe ends are curved, the straight side wall 13 joining with an end wall14 substantially at right angles to the wall 13, which wall, in turn,joins with a curved end wall 15, with a straight wall at 16, whichsubstantially parallels wall 14. Wall 16 is of short length. A curvedwall, of substantially a semi-circumference 17, joins wall 16, the wallterminating at 18 where it joins wall 19 which is spaced from andparallels wall 13. Wall 20 substantially parallels the wall 14 and joinswith the wall 21, paralleling the wall 13, wall 21 then merging with acurved end wall 22, which joins wall 13. I have detailed the characterof these walls as they receive lock mechanism and perform a function inthe practice of the invention.

The casing is transversely bored inwardly from one side wall 23, asshown at 24 and 25 the bore 25 communicating with the staple receivingrecess 4*. The casing is also bored transversely between the front wallof the casing and the rear wall 4 thereof to accommodate the barrel 1and the curved wall 17, in part spacedly surrounds the inner end of thesaid barrel.

Adapted to be received within the bores 24 and 25, and for movementtherein, is a locking bolt designated generally as 30. This locking boltis of a length which permits its ejection in part from side wall 23 ofthe casing or housing, in one position, and to be substantiallypositioned within said casing or housing in a second position, as seeFigures 3 and 4. The locking bolt has uniform diameter portions 31 and32 with an intermediate portion 33, of reduced diameter, thus providingannular end shoulders 34 and 35. The portion 32 is of shorter lengththan portion 33, and portion 32 is accommodated within the bore 25,while portion 31 is accommodated within the bore 24. Within the confineincluded between the curved end wall 22 and walls 13 and 21 is a stud 28provided with an end kerf 36. This stud may be secured within the routedportion 11 of the casing or housing by providing a screw-threaded borein the housing for said stud, or by otherwise securing the stud. Aspring,

designated generally as 37, is coiled about the said stud,

as shown in Figure 5, at 38, with a diametric end piece of said springreceived within the kerf, as shown at 39. The opposite end of the springis elongated and curved,- as shown in Figure 5, at 40. This curved endof the spring embraces the locking bolt within the reduced diameterportion 33 thereof, as shown in Figures 3, 4 and 5. The arrangement issuch that the curved end 40 always tends to revolve clockwise or fromthe position shown in Figure 3 to that of Figure 4, with the intent ofmoving the locking bolt to an open position, that is, wherein the boltportion 32 does not bridge the staple receiving recess 4, it being notedthat the end of portion 32 abuts the wall bounding the staple receivingrecess when the bolt is 7 shot.

erally as 60 for locking and unlocking the bolt 31.-- "This Portion 6.4terminates in a curved or looped portion 65 joining a straight portion66 which is substantially at right angles to arms 62 and 64. Portion 66joins a portion 67 which is substantially at right angles to portion 66.This portion is of short length and is substantially parallel toportions 62 and 64 when the spring is unstressed. Portion 67 merges withpart 68 at right angles to portion 67 and extends upwardly for a certaindistance where it joins with a curved portion 69 and a downwardlyextending portion 70, terminating in a straight portion 71, which issubstantially parallel to portion 68. From the shape of the spring, itwill be evident why the routed portion 11 is formed, as has beenpreviously described. End 61 fits against the curved end portion 72,while the arm 62 bears against the wall 14, the curved end of the spring63 fits within the curved wall portion 15, and the arm 64 bears againstthe wall 16. The curved portion 65 of the spring bears against the wall13, as shown in Figures 3 and 4, and in so doing, assures that theportions 62, 63 and 64 will remain in the routed portion. The ledgeformed by the angularly related walls 66 and 67 is for nose 53engagement. Portion 66 bears against the wall 13, while end portion 71bears against wall 19, and thus holds the spring in position betweenthese two walls. Thus, when the cam 50 is rotated from, say, theposition of Figure 3, to that of Figure 4, the nose 53 engages springportion 67 to move the spring downwardly. Portions 66 and 67 slidebetween and are guided by the walls 13 and 19, while the spring arms 62and 64 tend to approach at their outer ends, bending occurring atth'e'looped or curved end portion 15. The curved end at 69, with itsdownwardly inclined portion at 76,,is fairly abrupt and is adapted to bereceived in one position between the shoulders 34 and 35 and with thereduced diameter portion 33 of the locking bolt. This abrupt bend issuch as to act as a locking nose for the locking bolt and to engage theflanged end 35 with sufiicient pressure to prevent dislodgement of saidlocking nose portion of the spring from the locking bolt.

The operation, uses and advantages of the invention just described, areas follows:

Normally, the bolt and its associated mechanism will have the appearanceshown in Figure 4, that is to say, the locking bolt end 31 will beprojecting from the side of the said casing or housing, which permits astaple to enter the staple receiving recess 4*. The mechanism as showninFigures 3 and 4, in the completed lock, is covered by a back plate 80,which back plate carries a hook member 81, so that the bolt may behooked to the staple, if desired, or to a nail or other object when thepadlock is not being used.

Assuming, however, that all parts have been assembled and that thepadlock has the appearance shown in Fig-' ures l and 2, the tongue ofthe hasp may be swung so that the staple passes through slot 8,whereupon the padlock may be secured to the staple, the staple beingreceived within the staple receiving recess 4*, as shown in Figure 6. Itwill benoted that the base plate 80 is con-' tiguous to the tongue 7 ofthe hasp, and that the curved end of the staple encircles the lockingbolt end 32. The

locking bolt is shot by the operator pushing inwardly upon the end ofthe locking bolt, and specifically the portion 31, so that the lockingbolt is moved from the position of Figure 4 to that of Figure 3 undercounter force of spring 37, the loop end of the spring engaging theflange 34. When the bolt is shot, the locking nose 69 of the leaf springmoves along the periphery of portion 32 of the locking bolt, beingconstantly urged upwardly by the arm 64 tending to revolvecounter-clockwise from the position of Figure 4 to that of Figure 3,until the locking nose 69 moves from portion 32 and is received within areduced diameter portion 33, whereupon the arms 62 and 64 substantiallyparallel each other, as shown in Figure 3. In other words, the arms 62and 64 at all times tend to separate. When a key 2 is inserted withinthe locking barrel, the cam 50 may be revolved from the position shownin Figure 3 to that of Figure 4, and in so doing, the cam nose 53, byits engagement with por tion 67 of the leaf spring, will move the noseportion 69 of said leaf spring from the reduced diameter portion 33 ofthe locking bolt to cause approach of the arms 62 and 64 of said leafspring and the locking bolt, under spring tension of spring 37 whichwill move to the position shown in Figure 4 from that of Figure 3.

I have thus provided a padlock whereinthe locking mechanism for alocking bolt is also the means which is actuated when the lock barrelmechanism is rotated, and this leaf spring is an integrally fortnedmember, easily fabricated and which does away with the necessity of manyparts now generally incorporated in padlock mechanism. Breakage of theleaf spring, while not likely to occur, still if it does occur, iseasilyreplaced. The other parts of the padlock are not likely to be damaged orbroken.

I claim:

A padlock including: a housing formed with an elongated groove forreceiving and confining a staple, said housing being routed to provide afiat base portion and surrounding side walls; a locking bolt formovement transversely of the housing and to bridge the groove to securethe staple therein, said locking bolt'in one position externallyprojecting beyond the housing to release the staple from the groove;resilient means within the routed portion of the housing constantlyurging said locking bolt to an externally projecting position, a tumblertype locking barrel within the housing and provided with a campositioned in therouted portion and rotatable when the locking barrel isactuated; a leaf spring within the routed portion of the housing, theleaf spring bent to provide two arm portions and an interconnecting loopurging separation between the arm portions, one arm portion having anextension in substantially right angular relationship thereto, theextension being bent to provide aledge and a portion terminating in abent nose; said cam provided with a nose at all times in engagement withthe ledge of the leaf spring; said locking bolt formed with a reduceddiameter portion providing two annular shoulders, the nose portion ofthe leaf spring adapted to be received in the reduced diameter portionof the bolt between the annular shoulders when the locking bolt bridgesthe staple receiving groove, and to engage the periphery of the lockingbolt when the cam is rotated against the ledge to release the lockingnose from the reduced diameter portion; the side walls bounding therouted portion of the housing being so formed as to at all times guidemovement of the leaf spring when stressed'and unstressed.

References Cited in the file of this patent I 3 UNITED STATES PATENTS506,665 Browne et a1. Oct. 17, 1893 1,835,317 Miller Dec. 8, 19311,942,328 Fraim Jan. 2, 1934 2,233,115 Thiele r Feb. 25, 1941 2,656,704Mancuso Oct. 27, 1953 s FOREIGN PATENTS 944,206 France Oct. 25, 1948

